Geochemical assessment of CO2 perturbation in a shallow aquifer evaluated by a push-pull field experiment

Results suggest that, in the case of potential CO2 leakage in subsurface aquifers, the remobilization of bivalent metal cations (Fe, Mn, Zn) is relatively high, while it is limited for other elements such as As, Ca or Mg. This study provides a new data set for evaluating the impact of CO2 leakage in shallow aquifers and proposes specific methods for analyzing reaction pathways and kinetic reaction rates at the field scale.